Issue link: https://pros.com/learn/i/1527449
15 Modularity – the way forward Modularity is critical for ensuring that the airline technology stack remains adaptable and future-proof, preventing full commercial dependence on any single monolithic system. It empowers airlines to switch vendors and deploy new solutions as their strategies shift and technologies advance. When carriers have the freedom to choose the best solutions without extensive migration and integration challenges, it fosters a dynamic and competitive technology landscape, ripe with innovation and vendor collaboration. One of the foundations of a modular architecture is the concept of channel independence, where distribution channels like NDC or the airline.com internet booking engine (IBE) can be powered by solutions from any vendor, aligned to the airline's own commercial strategy. When these channels are confined to a closed ecosystem on top of the PSS, this restricts airlines' ability to deploy the right technology for their commercial needs and reduces the incentive for vendors to innovate. Furthermore, true modularity goes beyond simply integrating solutions from multiple sources. It is defined by seamless integration, strong governance models, unified SLAs and comprehensive observability across the entire ecosystem. This ensures that airlines maintain control and agility without the complexity of managing multiple vendor relationships and monitoring disparate systems. This holistic approach enables airlines to create a flexible, scalable technology stack that can evolve alongside changing market demands. Christopher Allison, Director, Product Management, Offer & Order, PROS